Drainage device for boiler-feed water pipes



Dec. 19, 1922.

W. M. VAN DER 'VOLGEN.

DRAINAGE DEVICE FOR BOILER FEED WATER PIPES.

FILED MAB/29,1921.

Patented Dec. 19, 1922.

TD s'rA'r WILLIAM M. VAN DER VOLGEN, OF BRIDGEIPORT, CONNECTIG'UT.

DRAINAGE DEVICE FOR BOILER-FEED WATER PIPES.

Application filed March 29, 1921. Serial No. 456,625.

To all whom it may concern:

Be it known that 1, WILLIAM M. VAN DER VoLenN, a citizen of the UnitedStates, residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inDrainage Devices for Boiler-Feed Watery Pipes; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains, to make and use the same. v

This invention relates to means for automatically draining boiler feedwater pipes, and is' particularly adapted for locomotives. It consistsin inserting a valve in the feed water pipe adapted to be closed by thepres sure of the feed water, and to automatically open to drain the pipewhen said pressure is removed.

Referring to the accompanying drawings;

Figure 1 represents a broken view of the feed and drain pipes, brokensectional view of the valve casing showing the valve seated as when theteed water is passing through the casing;

Figure 2 is a similar construction oi valve casing and pipes showing thevalve in open position to drain the feed water pipe, and

Figure 3 is a partial view of a locomotive showing the arrangement ofthe feed water pipe and the relation of the drain valve with respectthereto. p

1, Figure 3, is the feed water pipe for the boiler 2. This pipe connectswith the usual check valve 3 and also with the water tank of the tender,not shown. Within the cab i, and under the control of the engineer, islocated the common injector, not shown, and which is manually operatedby the engineer to cause water to be fed to the boiler as often asrequired to maintain the proper water level therein. The injector isthen closed leaving the feed pipe full of water, which, in extremelycold weather, will con eal and efllectually shut off further boilerfeed, it not otherwise removed.

The present invention consists of the valve body or casing 5 located inthe feed pipe and carrying the drain valve 6, which is automaticallyclosed on the seat 6 by the pressure of the feed water, Figure 1, andwill remain closed until the pressure is shut ofi, when the spring 7will ire-open the valve and allow water in the feed pipeto flow outthrough the drain pipe 8.

The valve 6 is preferably provided with the stem 9 guided through anopening in the rib or cross piece 10 located in the cha1nher A of thecasing extension 5, The pin 11in the lower end of the stem 9 will contact with the rib 10 to limitthe valve opening. To maintain the valve invertical po sition and to prevent cramping and improperly seating, andalso to insure its be ing instantly seated by the first impulse of thefeed water, the member 12 pivoted on the crosspin 13, and to the valveat the point 1 and said member extends far enough above the valve to getthe full force of the feed water and instantly seat the valve.

The shape, location, or means for connecting the member 1:2 with thedrain valve or the exact location of the valve is immaterial, as it isquite evident that all of the above features could be changed ormonilied and yet produce the required result, viz: to provide meansassociated with the valve to be acted upon by the force of the feedwater to instantly close the same during the continuance of such force,and said valveto automatically open when such force is spent.

Having thus describe my invention what I claim 1s:-

A drainage device for boiler feed water pipes comprising; a casingcoiniected with thevfeed water pipe having a drainage outletcasing andvalve seat therefor, a valve for the seat located within the feed watercasing, said outlet casing having a rib there-- in, the valve having astem guit ed in the rib and means carried by the stem adapted to contactwith the ribto limit the valve opening, a spring; located between thevalve and rib, a valve closing member pivotally located in the feedwater casing and pivotally connected to the valve. said member having 'aflange portion projecting well into the interior oi the feed watercasing and directly in line with the incoming teed waterto get the fulli'orce of the water to closethe valve. 1 i

In testimony whereof I atlix my signature. l

NlLLIAllfl M. VAN DER VOLGEN.

